Measurement is made directly across both terminals of blown fuse or tripped circuit breaker in a120VAC line?

Question

If the function/range switch is set at 200 VAC, what will the mulitmeter read if a measurement is made directly across both terminals of a blown fuse or tripped circuit breaker in a 120 VAC line?
A) 0 VAC
B) 120 VAC
C) 200 VAC
D) 120 VDC

Answer 1

Probably B, but possibly A. If all loads were cleared from the circuit after the fuse blew, A would be correct. If any loads remain, it will be B.

Answer 2

If I remember right it is B

Your voltage potential is 120 VAC and therefore C and D can not be one of the options in this case. So the question is, will you measure voltage across an open circuit.

the open circuit has a hot side and a ground side....voltage measured will be 120VAC across the open circuit.

If the fuse was good, you would measure 0VAC (or close to it) because the meter is a load and electricity will take the course of least resistance.......a fuse, being a wire, has little resistance but your meter does so the meter will not measure voltage unless you measure across an open circuit (large resistance) or a component (some resistance)

Answer 3

a

even if the fuse or breaker was not blown, measure with a voltmeter accross a fuses that is passing current through it from one point of the fuse to another will not read you anything, as the for AC current you need to measure from HOT to GROUND or NUETRAL ( same for a breaker )..

but if you set the voltmeter to continuity you get a tone if the fuses is intact, and no tone if the fuse is blown thus indicating an open circuit. Of course if you get tone from HOT to GROUND that can either indicated a short, or you ar reading thru a filament or windings

Answer 4

Think about it.....

It the fuse is blown, the circuit is open!

You can't read any resistance, amperage, or voltage across any open circuit.

Make sense???

Answer 5

B